1.x-0.5.1

Fix plain-text notification email formatting

• Send the text/html header only when an HTML-capable mail system is active, so plain-text emails keep their line breaks instead of collapsing to one line.
• Flatten links to a bare URL in plain-text emails so the secure link is no longer repeated in a footnote at the bottom

1.x-0.5.0

Send passwords and confidential documents as expiring, one-time secure links instead of emailing them. The recipient opens a link, clicks Reveal, and reads the message or downloads the attachment; one-time messages are then destroyed. Everything is encrypted with a key derived from the link itself, so the site cannot read what it stores. Built on the Acuity Secure Link engine.